2019-03-21T19:20:25ZThe Effect of Phosphorous Fertilization on Indian Pennyworth (Centella asiatica L. Urban) in High Altitudehttp://repository.ipb.ac.id/handle/123456789/57555
The Effect of Phosphorous Fertilization on Indian Pennyworth (Centella asiatica L. Urban) in High Altitude
Aziz, Sandra Arifin; Ghulamahdi, Munif; Afrida, Andria
The experiment was conducted to determine the effect of phosphorous fertilization on growth and production of Indian pennyworth (Centella asiatica L. Urban) in the high altitude (1,500 m above sea level/asl). This experiment was carried out at Gunung Putri experimental station Balittro, Cipanas, Cianjur in October 2008 until April 2009. The treatment was laid-out in a Complete Randomized Block Design and consisted of single factor with 5 replications. The factor was P2O5 fertilization i.e 0,30, 60, 90, and 120 kg P2O5 ha-1. The results of the experiment showed that P2O5 fertilizer significantly increased the total leaf number, leaf length, the total flower number, leaf thickness of mother plant and production components at 6 month after planting. The highest production (1.34 ton dry weight.ha-1)was achieved by 60 kg P2O5 ha-1. The optimum dosage to improve dry weight production of Indian pennyworth in high altitude was 65.84 kg P2O5ha-1.
2011-04-01T00:00:00ZStudi karakter mutu buah pepaya IPBhttp://repository.ipb.ac.id/handle/123456789/53820
Studi karakter mutu buah pepaya IPB
Suketi, Ketty; Poerwanto, Roedhy; Sujiprihati, Sriani; Sobir; Widodo, Winarso D.
The objective of the experiment was to investigate the physical and chemical characteristic of eight genotypes of papaya i.e. IPB1, IPB2A, IPB 3, IPB 3A, IPB 4, IPB 7, IPB 8, and IPB 9 on two stages of ripening period based on percentage of yellow area of fruit pell (75%yellow and 100% yellow.)The fruit were picked at 25%yellow of fruit pell colour. The experiment was conducted in split plot with completely randomized block design. The main plot was ripening periods of 75% and 100% ripe, while the genotypes were taken at sub-plot. There was no significant different on physical and chemical between papaya at stadium 75% and 100%yellow. Fles firmess of IPB9 was better than IPB 1, IPB 4 and IPB 8. Ascorbic acid content of IPB 4 (107.39 mg/100 g) was higher than that of IPB 2A and IPB 3A. Carotenoid content of IPB 4 (29.73 mg/100g) was higher than that of the other genotypes.
2010-01-01T00:00:00ZExploration of pectin - utilizing yeast from soil of Bogor and wleri fruit orchardhttp://repository.ipb.ac.id/handle/123456789/53704
Exploration of pectin - utilizing yeast from soil of Bogor and wleri fruit orchard
Hazra, Fahrizal
There is a high demand on pectin-utilizing yeasts for industrial, agricultural and environmental purposes. Further exploration of yeast from various sources are important to enrich yeast culture colleclions. Nine yeast strains were isolated from various soil sources sampled based on biological sampling in Bogar and Central Java. Enriched media containing pectin as carbon sources was employed for isolation of the yeast. The isolated yeast were identified according to the methods described in monographs by Kreger - Van Rij (1984), Barnell et.al (2000). Guilliermond and Tanner (2006) . The strains isolated were taxonomically separated into 3 groups. Group I contains 3 strains, and this group is closely related to Candida tropicalis. Group II contains 4 strains, and this group is included in this genus Rhodotorula. Group III contain 2 strains, and this group is closely related to Williopsis saturnus, which is a synonym of Hansenula saturnus. Pectinolytic enzymes (Polygalacturonase) were produced by all of the tested strains. Polygalacturonase was produced as high as 1,7 U.ml1 by strain no. III of group 1,7 U.ml1 by strains no. 123 of group II, and 1,0 U.ml1 by strain no. 211 of group III.
2011-01-01T00:00:00Z